[{ "title" => "line 1", "style" => "lines" , "type" => "matrix"}, [ 1, 6318 ], [ 2, 7903 ], [ 3, 25617 ], ]
[{ "title" => "line 2", "style" => "lines" , "type" => "matrix"}, [ 1, 6215 ], [ 2, 7831 ], [ 3, 25782 ],]